4.1001.8a
All surfaces where
SPF
SPF
Spray polyurethane foam
is applied will be clean, dry, and free of contamination and degradation
Substrate surfaces will be wiped, blown, or vacuumed to be free of excessive dust and dirt
Grease and oil will be removed using appropriate cleaners or solvents
Moisture content of all wood substrate materials will be checked to ensure it is below 18%
Ensure proper bonding of
SPF
SPF
Spray polyurethane foam
to substrate surfaces
4.1001.8b
Vent chutes will be installed between all rafters or trusses to ensure a continuous ventilation path between the eave or soffit area and the ridge or roof vent
Dams will be penetrated by vent chutes, as needed
Allow ventilation of underside of roof deck sheathing while creating an unvented, conditioned attic space
4.1001.8c
Attic space ventilation to be retained will be appropriately baffled and protected to allow for maximum application of foam insulation at exterior top plate/vent interface without blocking or compromising ventilation pathway
Installation will allow for the highest possible R-value above the top plate of the exterior wall
Ensure insulation R-value is not reduced
Minimize waste of
SPF
SPF
Spray polyurethane foam
Provide a ventilation path from eave or soffit to ridge vent when a vented roof deck is required
Ensure continuous insulation and air seal of top plate and roof deck
4.1001.8d
vapor retarder
Vapor retarder
A material that slows the passage of water vapor and contains a perm rating above 1
All existing attic floor insulation and
vapor retarder
Vapor retarder
A material that slows the passage of water vapor and contains a perm rating above 1
will be removed
Ensure the new conditioned space is coupled with the conditioned space
